What is RakeSearch?

The enormous size of the diagonal Latin squares space makes it unfeasible to enumerate all its objects straightforwardly in reasonable time. So, in order to discover the structure of this space, sophisticated search methods are needed. In RakeSearch project, we implement an application that picks up separate pairs of mutually orthogonal DLSs, which allows to reconstruct full graphs of their orthogonality. You can contribute to our research by running a free program on your computer.

For account creation please use a Crunch_4Science invitation code.

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User of the Day

User profile Profile Rhodan71
I live in France where I work as a freelance in software development. I support every project but especially astronomic and mathematic ones.


New run for RakeSearch R10
Dear folks!

We created the first bunch of tasks for new search in rank 10 space. Currently - under Linux x86-64. Renewed search use a new application, runtime increased in several times and new application return more data than previous. If tasks processing is successful tomorrow we add details! :)

Great thanks for Daniel from BOINC@Poland for attention, scientific critical perception and help!
15 Jul 2019, 19:49:07 UTC · Discuss

Project results for rank 9
Dear participants!

Today, on July 11, our project turns 23 months! In June, the latest search results were obtained on the DLS space of rank 9 and we begin to sum it up! The first and very important one is the number of diagonal Latin squares of rank 9. Each result recorded the number of processed DLSs and now, summing them up, we got the number 5 056 994 653 507 584, which coincided with the result of our colleagues from Gerasim@Home, listed in OEIS. Since the computational modules were developed independently, they did not use the same algorithms, the division of the space into tasks was different, and the optimized Daniel’s application was also useds, this is a very important result confirming the first assessment and the fact that the search covered all DLSs of rank 9!

Another result is that a paper on the project has been accepted to a “Communications in Computer and Information Science” series as one of selected papers of a conference “Russian Supercomputing Days”. It will be published in 2019 and we will share the link with you.

Discussion in Russian is here.
11 Jul 2019, 4:50:45 UTC · Discuss

R10 search temporary stopped!
Dear participants!

We stopped the sending of tasks for R10 RakeSearch due signal from Daniel about incorrect fragment of code of new application. Now we investigate the problem and after this - (presumably) will build a new application.
25 Jun 2019, 12:53:05 UTC · Discuss

Results of the first half of the June 2019!
Dear participants!

The search of "permutational ODLS" of rank 9 mostly completed in the first half of June. At the time of this report only several hundreds of results still in process state and maybe this report - the last report about findings. Any process has a beginning, life, and an end. Life of search in space of rank 9 comes to an end like a blooming flower. But the end of blossoming is not an end of a plant! In place of flowers come fruits! And after receiving the last result the next stage of work will start. And as the symbol of this month, we choose a wild rose, rosehips of which many hundreds of years are a source of vitamins and flavored tea! During the first part of the month, 2388 results were found by 171 participants and each of them got a badge from a photograph, that made by previous summer at one of the city parks of Karelia. We send our congratulations to:

fix and Stavebni firma Bostik Porici (LITOMYSL Boinc Team Czech Republic),
bluestang (XtremeSystems) and [AF] Skinny06 (L'Alliance Francophone),
JZD and Miroslav Splichal (LITOMYSL Boinc Team Czech Republic),
igos and [AF>Amis des Lapins] Phil1966 (L'Alliance Francophone),
adams and KWSN-SpongeBob SquarePants (The Knights Who Say Ni!),
Peter and [DPC]Division_Brabant~Cow_tipping (Dutch Power Cows),
arkiss and [AF>Amis des Lapins] Ceclo (L'Alliance Francophone),
rrubtsov and [AF>WildWildWest]Sebastien (L'Alliance Francophone),
matemajor and Frenky Picasso (LITOMYSL Boinc Team Czech Republic),
Millenium and [AF>Libristes]MortelKni (L'Alliance Francophone),
koronabora and [AF>Libristes]cguillem (L'Alliance Francophone),
Hartmut 53 and [AF>Occitania]franky82 (L'Alliance Francophone),
mike765321 and jiri kovar (LITOMYSL Boinc Team Czech Republic),
AlexxSaigon and [AF>Libristes] Elorak (L'Alliance Francophone),
Guido Coppens and Международная база наблюдений комет (Karelia),
EG (SETI.USA) and Karelian Center for Gender Studies (Karelia),
Bok (SETI.USA) and Sussie (LITOMYSL Boinc Team Czech Republic),
marmot (Gridcoin) and BoincBoinc8 (L'Alliance Francophone),
ale4316 (Ukraine) and Michael H.W. Weber (Rechenkraft.net),
saiz (Team China) and physics_engineer (Dutch Power Cows),
Casey ([H]ardOCP) and LeChat51X (L'Alliance Francophone),
FourOh (SETI.USA) and Steve Dodd (The Planetary Society),
Oleg (Russia Team) and Thyler Durden@P3D (Planet 3DNow!),
ID4 (SETI.Germany) and Rhodan71 (L'Alliance Francophone),
pututu ([H]ardOCP) and Тестовая учетная запись (Karelia),
marsinph (BOINC.BE) and BetelgeuseFive (Dutch Power Cows),
-jb- (SETI.Germany) and dpc_kluizenaar (Dutch Power Cows),
Kodeks IT (Karelia) and cineon_lut [BlackOps] (SETI.USA),
mcgrame (U.S. Army) and cyrusNGC_224@P3D (Planet 3DNow!),
KR Center (Karelia) and Matthias Lehmkuhl (SETI.Germany),
ИСУ ПБиОТ (Karelia) and [SG]KidDoesCrunch (SETI.Germany),
el_teniente (Russia) and joe carnivore (Rechenkraft.net),
JonS (UK BOINC Team) and [SG-FC] dingdong (SETI.Germany),
VogeL (SETI.Germany) and Bill F (Worldwide TechServices),
purplecfh (SETI.USA) and Tom_unoduetre (Rechenkraft.net),
citerra (Russia Team) and Fire$torm [BlackOps] (SETI.USA),
Nexuss (SETI.Germany) and owensse (The Planetary Society),
lydy1993 (Team China) and [SG-FC]schilli74 (SETI.Germany),
RoE187 (SETI.Germany) and Johannes Elsner (Planet 3DNow!),
Philip (OZ Crunchers) and [DPC] hansR (Dutch Power Cows),
genseed (Russia Team) and Sergey Zhikhorev (Russia Team),
jozef j (Russia Team) and Wabi CZ (Czech National Team),
Conan (Cobar Spiders) and entigy (Team England (Boinc)),
whowhere (AUGE@BOINC) and Птицы Петрозаводска (Karelia),
xoltar (SETI.Germany) and Dmitriy Otroschenko (Ukraine),
Gaucho (SETI.Germany) and http://vk.com/boinc (Karelia),
SergOZ (Crystal Dream) and Bigos2 (Czech National Team),
VietOZ (XtremeSystems) and killik (Czech National Team),
RFGuy_KCCO ([H]ardOCP) and polarbeardj (Crunching@EVGA),
JagDoc (Planet 3DNow!) and Theadalus (Dutch Power Cows),
GLeeM (TeAm AnandTech) and Tae Hyun Kim (SETIKAH@KOREA),
Timothy Mullican (USA) and ChristianVirtual ([H]ardOCP),
neon7515 (Russia Team) and Uwe-Bergstedt (SETI.Germany),
emoga (TeAm AnandTech) and PDW (OcUK - Overclockers UK),
FritzB (Planet 3DNow!) and [SG-2W]Kurzer (SETI.Germany),
Gipsel (Planet 3DNow!) and Ralfy (BOINC Confederation),
Soderstromm (Gridcoin) and [SGa]HeNiNnG (SETI.Germany),
heizer (Planet 3DNow!) and Astronomy.Karelia (Karelia),
Kalomel (BOINC@Poland) and Skivelitis2 (Overclock.net),
Shmya-2 (Crystal Dream) and Tatka (Czech National Team),
whizbang (Ars Technica) and Rudy Toody (TeAm AnandTech),
Dingo (BOINC@AUSTRALIA) and [B@P] Daniel (BOINC@Poland),
sergamena (Russia Team) and stoneageman (XtremeSystems),
Opolis (Crunching@EVGA) and Pjotr Panski (SETI.Germany),
Spritex (BOINC@Denmark) and Rubencs (Dutch Power Cows),
herby44 (Planet 3DNow!) and bcavnaugh (Crunching@EVGA),
daniel.sawitzki@gmx.net and Bruce Kennedy (BOINCstats),
Freezing (SETI.Germany) and [SG-FC]shka (SETI.Germany),
mmonnin (Overclock.net) and nexiagsi16v (SETI.Germany),
zzuupp (TeAm AnandTech) and ReaDy (Astronomy.Ru Forum),
Hoshione (SETI.Germany) and alfRKnet (Rechenkraft.net),
СУНТД Карелия (Karelia) and Besessener (Planet 3DNow!),
Uli2* (Sicituradastra.) and desktop64 (desktop64@home),
gbaker3 (Crunching@EVGA) and Vincent Dark (Team China),
muzzdiez (SETIKAH@KOREA) and SG-Booster (SETI.Germany),
Jaari (Dutch Power Cows) and PC-COLLEGE (SETI.Germany),
CoolAtchOk (Russia Team) and Landjunge (Planet 3DNow!),
[SG]Felix (SETI.Germany) and Roadranner (SETI.Germany),
gingavasalata (Hrvatska) and BotXXX (Dutch Power Cows),
LordNord (Planet 3DNow!) and freestman (Chinese Dream),
Damic (Dutch Power Cows) and ChelseaOilman ([H]ardOCP),
pschoefer (SETI.Germany) and LCB001 (Hardware Canucks),
XSmeagolX (SETI.Germany) and [SG]steini (SETI.Germany),
hase (SETI-team-hannover) and Sengieffe (UK BOINC Team),
Natalia (Karelia) and hoarfrost (Crystal Dream),
HK-Steve (Crunching@EVGA).

Thank you for attention to the project and participation!
17 Jun 2019, 21:10:37 UTC · Discuss

Будущее проекта RakeSearch (Ru)
Дорогие участники!

Поиск ОДЛК 9-го порядка на 99.9% близок к завершению. Запущены тестовые задания для 10-го порядка, пока — только для платформ Linux x86-64 и Windows x86-64. В среднем одно такое задание осуществляет перебор большего числа квадратов за то же самое время. Пока что ни в одном задании не удалось обнаружить пары перестановочных квадратов 10-го порядка. Мы планируем провести тестовый поиск по небольшой части пространства квадратов (возможно, порядка миллиона), чтобы понять перспективы. Если таких пар не найдется, то проект разумно будет завершить, чтобы не занимать ваши процессорные мощности зря. Если найдутся — это будет новым результатом и базой для нового поиска.

В любом случае, проект не дублирует расчеты Gerasim@home и ODLK/ODLK1 для 10-го порядка.

Обсуждение на английском здесь.

С уважением, Наталия и hoarfrost
12 Jun 2019, 16:50:50 UTC · Discuss

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